"It was very difficult for us to get a script in order. We had done 200 episodes of the show, and to try and create some kind of finale in a two-hour film was difficult, but we've finally gotten that in order and now we're juggling schedules," he said.

"That is what we're going to do now in about eight months. I was hoping to be able to do it in about six weeks, which is not very reasonable at all."

Sutherland previously described the 24 film as a "direct continuation" of the television series. Executive producer Howard Gordon confirmed to Digital Spy in November 2010 that Mary Lynn Rajskub will appear in the proposed film as Chloe O'Brian, but no other supporting cast has been announced.

Die Hard 4 screenwriter Mark Bomback was reported to be working on a new script draft for the project in December.